| 摘要 |
A method of evaluating a tuneable laser and determining suitable laser operation points, wherein the laser includes two or more tuneable sections i n which injected current can be varied, said sections including at least one reflector section and one phase section. The invention is characterised by varying the current injected through the reflector section, i.e. the reflect or current, at different constant currents injected through respective remainin g tuneable sections; measuring the laser power output at the front or the rear mirror of the laser; sweeping the reflector current in one direction and the n in the opposite direction back to its starting value while measuring and storing the power; calculating the power difference with one and the same reflector current, but in said different sweep directions; and detecting and storing as hysteresis-free current combinations those combinations which giv e rise to a power difference that falls below a predetermined level.
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